Combined JavaScript to Toggle/Hide QuickLaunch Menu and show MultiLine Preview

If you need to hide and display the SharePoint QuickLaunch menu on every page in a site then you are going to have to go into the master page to do it. (Be careful, screwing up a master page can lead to a completely damaged site!)

Choose a location in the master page where you want your QuickLaunch toggle icon to be displayed. (I use the space at the top right of the page, just next to the blue Help Icon).